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81040147674 = 2363012143579
BaseRepresentation
bin100101101111001011…
…1101000010011011010
321202011211100001100220
41023132113220103122
52311432234211144
6101121311340510
75566151614053
oct1133627502332
9252154301326
1081040147674
1131407061462
1213858221736
13784678ab05
143ccad7772a
152194980919
hex12de5e84da

81040147674 has 16 divisors (see below), whose sum is σ = 162106093920. Its totient is φ = 27009082800.

The previous prime is 81040147631. The next prime is 81040147711. The reversal of 81040147674 is 47674104018.

It is a super-2 number, since 2×810401476742 (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1033984 + ... + 1109595.

It is an arithmetic number, because the mean of its divisors is an integer number (10131630870).

Almost surely, 281040147674 is an apocalyptic number.

81040147674 is an abundant number, since it is smaller than the sum of its proper divisors (81065946246).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81040147674 is a wasteful number, since it uses less digits than its factorization.

81040147674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2149885.

The product of its (nonzero) digits is 150528, while the sum is 42.

The spelling of 81040147674 in words is "eighty-one billion, forty million, one hundred forty-seven thousand, six hundred seventy-four".

Divisors: 1 2 3 6 6301 12602 18903 37806 2143579 4287158 6430737 12861474 13506691279 27013382558 40520073837 81040147674